Probably tied up doing tutorials on the run to the exams, so if you want an answer from them, this isn't the best way at a busy time of year.
Also, the tutors try to encourage other students to answer the questions before they step in themselves, so don't expect an immediate response.
Apologies for the slow reply to many of the recent threads. I have been having some technical difficulties that couldn't be resolved until I returned to the office after a spell of teaching. Typically I won't reply to a thread for a few days to see if other students have an answer, but I should be able to respond within a week now that our IT has returned to normal. As the exam approaches I'll look to answer queries more quickly. Best wishes Mark